chip im no qualified nutritionist but id say you could still eat more of different things and loose even more weight. you may think a fruit smoothie in the evening would be the best thing for you, but its not, that fruit smoothie probably contains as many calories from sugar as a litre of coke, which, if you dont use, will be turned to fat and stored, especially now while youre vertually starving yourself of complex carbs.

imo, aswell as/instead of the apple in the morning eat some complex carbs, ie, cereal or toast. and drop the smoothie in the evening for something like 2 tins of tuna with low fat salad cream/dressing, or something along the lines of a pack of those flavoured chicken pieces that supermarkets do, a couple of hundered grams of ham, or some low fat, low carb soup like minestrone.

try and drink some milk during the day too, iirc you like milk? and a litre of skimmed milk contains hardly any fat but plenty of proteins and a few sugars. an ideal meal/snack.

carb intake needs to eb on a sliding scale, loads on the morning to sort you out for the days work, fewer at lunch, and none in the evening, as youre just gonna be sat around doing FA. i bet if you try that for a week, you'll feel better, and may even lose more weight.